Contents Section: Mechanical All sections

7.5l v8 - VIN [l] Ford Cab & Chassis Ranger

Mechanical 21 illustrations ~4003 words

ENGINE IDENTIFICATION

Note. For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.

The eighth character of the Vehicle Identification Number (VIN) identifies engine. VIN is near windshield on left upper side of instrument panel. The VIN number is also on the Safety Compliance Certification Label, attached to left door lock pillar.

ApplicationVIN Code
7.5L V8 4-Bbl.L

ENGINE IDENTIFICATION CODES

Scheme 79

Scheme 79: VALVE CLEARANCE ADJUSTMENT
  1. Turn crankshaft to place No. 1 piston on TDC at end of compression stroke. Make chalk mark at points "A" and "B" on crankshaft pulley at TDC. (Scheme 79) Rotate crankshaft 360° for mark "B". (Scheme 79): Crankshaft Positions for Valve Adjustment
  2. Using lifter bleed-down wrench, apply pressure to push rod end of rocker arm. Slowly bleed down lifter until lifter plunger is completely bottomed.
  3. While holding lifter in this position, check clearance between rocker arm and valve stem tip with a feeler gauge. Desired collapsed lifter gap clearance is.100-.150" (2.54-3.81 mm), allowable clearance is.075-.175" (1.90-4.45).
  4. If clearance is less than specified, install a.060" (1.52 mm) shorter push rod. If clearance is greater, install a.060" (1.52 mm) longer push rod.
Piston At TDCAdjust IntakeAdjust Exhaust
A1, 3, 7, 81, 4, 5, 8
B2, 4, 5, 62, 3, 6, 7

VALVE CLEARANCE ADJUSTMENT

ENGINE REMOVAL

See ENGINE REMOVAL article.

Removal

  1. Drain cooling system. Remove air cleaner and ducting. Disconnect coolant hoses at intake manifold and water pump and position them aside. Remove PCV valve and hose. Label and disconnect all vacuum hoses at carburetor, vacuum control valve and intake manifold.
  2. Disconnect spark plug wires at spark plugs and remove wires from valve cover brackets. Disconnect high-tension lead at coil. Remove distributor cap and spark plug wires as an assembly.
  3. Remove distributor with vacuum hoses attached. Disconnect accelerator linkage. If equipped, disconnect transmission kickdown linkage and speed control linkage bracket at carburetor.
  4. Remove accelerator linkage attaching bolts. Position all linkages out of way. Disconnect fuel line at carburetor.
  5. Label and disconnect all electrical wiring from intake manifold. Remove coil and bracket assembly. Remove intake manifold and carburetor as an assembly.

Scheme 80

Scheme 80: Installation

Scheme 81

Scheme 81
  1. Clean all gasket surfaces. Apply 1/8" bead silicone sealer to 4 corners of cylinder block seal mounting surface. Install manifold gasket and front and rear seals. Apply 1/16" bead silicone sealer along full width of front and rear seal ends. (Scheme 80) (Scheme 80): Intake Manifold Sealer Application Points Install intake manifold within 15 minutes of applying sealer.
  2. Position intake manifold over 4 studs in cylinder heads. Check for proper alignment of gaskets and seals before tightening. Tighten intake manifold, then repeat tightening sequence. (Scheme 81) (Scheme 81): Intake Manifold Tightening Sequence Tighten to 22-32 ft. lbs. (30-43 N.m), then repeat tightening sequence.
  3. To complete installation, reverse removal procedure. Retighten intake manifold after engine has reached normal operating temperature.

If removing right exhaust manifold, remove air cleaner, ducting and heat shroud. Remove spark plug wires from spark plugs. Disconnect exhaust pipe from exhaust manifold. Remove attaching bolts, then remove manifold, lifting bracket and spark plug heat shields.

Installation

  1. Clean mating surfaces of cylinder head and manifold. Clean mounting flange of manifold and exhaust pipe. Apply light film of graphite grease to manifold machined surface.
  2. Position spark plug wire heat shields and exhaust manifold on cylinder head. Install attaching bolts and washers, starting at 4th bolt hole from front of each manifold. Position lifting bracket under bolts at 3rd exhaust port from front of engine.
  3. On right exhaust manifold, install shoulder stud for air intake heat shroud at 1st and 6th bolt holes from front of manifold. Install shoulder stud for dipstick tube in 1st hole of left exhaust manifold. Tighten exhaust manifold. Using new gaskets, install and tighten exhaust pipes.
  1. Drain cooling system. Remove intake manifold. Disconnect exhaust pipes at manifolds. Loosen alternator attaching bolts and remove bolt attaching alternator bracket to right cylinder head.
  2. If A/C equipped, loosen drive belt. Shut off compressor at service valves and remove valves and hoses from compressor. Remove A/C compressor support bracket attaching nuts from water pump. Remove and position compressor aside. Remove compressor upper mounting bracket from cylinder head.
  3. If equipped, remove bolts attaching power steering reservoir bracket to left cylinder head. Position reservoir and bracket out of way. Remove valve covers. Remove rocker arm assemblies and push rods in sequence, so they can be installed in their original positions.
  4. Remove cylinder heads and exhaust manifolds as assemblies. Discard cylinder head gaskets. Remove exhaust manifolds.
  1. Clean gasket mating surfaces. Check flatness of cylinder head and block mating surfaces. If exhaust manifolds were removed, install on cylinder head.
  2. Place 2 long head bolts in 2 rear lower bolt holes of left cylinder head. Place 1 long head bolt in rear lower bolt hole of right cylinder head. Keep bolts in position until heads are installed.
  3. Position head gaskets on block. DO NOT apply sealer to head gasket surfaces. Install and tighten cylinder heads in 3 steps. (Scheme 82)
  4. To complete installation, reverse removal procedure. Check and adjust valve clearance as needed. See «VALVE CLEARANCE ADJUSTMENT»(/ford/cab-chassis-ranger/1985-1986/remont/mechanical/#75l-v8-vin-l).

Cylinder Head Tightening Sequence Tighten to 80 ft. lbs. (108 N.m), then to 110 ft. lbs. (149 N.m), and finally to 130-140 ft. lbs. (176-190 N.m). Scheme 82

Scheme 82: Cylinder Head Tightening Sequence Tighten to 80 ft. lbs. (108 N.m), then to 110 ft. lbs. (149 N.m), and finally to 130-140 ft. lbs. (176-190 N.m).

Left Side

E-I-E-I-E-I-E-I (Front-to-rear).

Right Side

I-E-I-E-I-E-I-E (Front-to-rear).

ROCKER ARM ASSEMBLY

  1. Inspect all rocker arm components for excessive wear or damage and replace as necessary. Before installing rocker arm assembly, lubricate top of valve stem, fulcrum seat and socket area of rocker arm with polyethylene grease.
  2. Ensure fulcrum seat base is inserted in its slot on cylinder head before tightening fulcrum bolt. (Scheme 83)

Rocker Arm Assembly Tighten fulcrum bolt to 18-25 ft. lbs. (24-34 N.m). Scheme 83

Scheme 83: Rocker Arm Assembly Tighten fulcrum bolt to 18-25 ft. lbs. (24-34 N.m).
  1. Remove air cleaner and duct assembly. Remove valve cover and spark plug from cylinder to be serviced. Rotate crankshaft until piston is at TDC at end of compression stroke. Remove rocker arms and push rods from valves to be serviced.
  2. Install an air hose with adapter into spark plug hole and turn on air supply. DO NOT remove air pressure on until valves are supported. Install rocker arm fulcrum bolt. Using a spring compressor, compress valve spring and remove retainer locks. Remove retainer, spring and oil seal. (Scheme 84)

Removing and Installing Valve Spring If air pressure fails to hold valve closed, remove cylinder head and inspect for possible valve damage. Scheme 84

Scheme 84: Removing and Installing Valve Spring If air pressure fails to hold valve closed, remove cylinder head and inspect for possible valve damage.

Inspection

  1. Wrap a rubber band or tape around end of valve stem. This will keep valve from falling into cylinder if air pressure forces piston downward. Turn off air supply.
  2. Inspect valve stem for wear and out-of-round condition. Move valve up and down in guide and check for binding. Using valve spring tester, test springs for proper tension. Replace springs that fail to meet specifications.
  3. Inspect each spring for squareness using a steel square and flat surface. Measure gap between top spring coil and square while slowly rotating spring. Replace spring if more than 5/64" out-of-square. (Scheme 85)

Checking Valve Spring Squareness Measure gap while slowly rotating spring. Scheme 85

Scheme 85: Checking Valve Spring Squareness Measure gap while slowly rotating spring.
  1. Hold valve closed and turn air pressure on again. Install new valve stem oil seals. Place spring in position over valve and position spring retainer in place. Compress valve spring and install retainer locks. (Scheme 84)
  2. Apply polyethylene grease to push rod ends, valve stem tip, fulcrum seats and sockets. Install push rods and rocker arms. Turn off air pressure. Remove air hose and adapter. To complete installation, reverse removal procedure.

VALVE SPRING INSTALLED HEIGHT

CAUTIONInstall spacers only if necessary. Excess use of spacers will stress valve train.
  1. Using dividers and a scale, measure installed height of valve spring. Measure from surface of cylinder head spring pad to underside of spring retainer (or rotator). (Scheme 86)
  2. If spring height is excessive, install.030" (.76 mm) spacer(s) between cylinder head spring pad and valve spring.

Checking Installed Height of Valve Spring Do not install spacer(s) unless necessary. Scheme 86

Scheme 86: Checking Installed Height of Valve Spring Do not install spacer(s) unless necessary.

SPRING LENGTH SPECIFICATIONS

ApplicationIn. (mm)
7.5L1.797-1.828 (45.64-46.43)

VALVE SPRING INSTALLED HEIGHT SPECIFICATIONS

VALVE STEM OIL SEALS

Umbrella-type oil seals are used on all valves. Lubricate valve stem with engine oil and install new seal with cup side down over valve guide. Use a 5/8" deep-well socket and light mallet to seat seal on valve stem.

VALVE GUIDE SERVICING

When reaming guides, always use reamers in proper sequence. Always reface valve seats and valves after valve guides are reamed. Replacement valves are available with standard, .015" (.38 mm), and .030 (.76 mm) oversize stems.

Scheme 87

Scheme 87: HYDRAULIC VALVE LIFTERS
  1. Service lifters as assemblies only. Disassemble and clean lifters before testing. Test lifters with hydraulic lifter test fluid. DO NOT interchange parts between lifters. (Scheme 87) (Scheme 87): Hydraulic Valve Lifter Assembly Parts are not interchangeable between lifters.
  2. Leak-down rate on hydraulic lifters is 10-50 seconds, with 1/16" (1.6 mm) plunger travel under 50 lb. (23 kg) load. Replace lifter if it fails leak-down test, or is worn or damaged.
  1. Drain cooling system and crankcase. Remove fan and radiator shroud. Disconnect radiator hoses at engine and oil cooler lines at radiator and remove radiator.
  2. Remove all drive belts and water pump pulley. Remove air pump. If equipped, remove A/C compressor support bracket from water pump. Disconnect heater hose from water pump and loosen by-pass hose clamp at pump.
  3. Remove crankshaft pulley, vibration damper and Woodruff key from crankshaft. Disconnect and plug fuel line inlet at fuel pump and remove fuel pump. Remove bolts attaching front cover to cylinder block.
  4. Remove front cover and water pump as an assembly. Using a knife, cut oil pan seal flush with cylinder block face. Discard front cover gasket and pan seal.

Scheme 88

Scheme 88: Installation
  1. Coat gasket surface of oil pan with gasket sealer. Cut and position required section of a new seal on oil pan. Apply silicone sealer at block-to-pan junction. Apply gasket sealer to front cover and cylinder block gasket surfaces.
  2. Position front cover on cylinder block. Install Front Cover Seal Aligner (T68P-6019-A) on crankshaft. (Scheme 88) Coat threads of cover bolts with oil-resistant sealer and install bolts. (Scheme 88): Aligning Front Cover To install aligner, it may be necessary to force cover down against pan seal.
  3. While pushing in on aligner, tighten oil pan-to-cover bolts. Remove aligner and tighten front cover-to-cylinder block bolts. To complete installation, reverse removal procedure.

With engine front cover removed, drive out old oil seal with pin punch. Clean seal recess in front cover.

Coat new seal with polyethylene grease and install seal using Seal Installer (T72J-177). Ensure seal spring remains in proper position.

TIMING CHAIN & SPROCKET

Note. Perform following procedures with engine front cover removed.

Scheme 89

Scheme 89: Checking Timing Chain Deflection
  1. Rotate crankshaft counterclockwise (as viewed from front of engine) to take up slack on left side of timing chain. Establish a reference point on the block and measure from this point to left side of chain. (Scheme 89) (Scheme 89): Measuring Timing Chain Deflection Maximum deflection is 1/2" (12.7 mm).
  2. Rotate crankshaft clockwise to take up slack on right side of chain. Force left side of chain outward and measure distance between reference point and chain.
  3. Deflection is difference between the 2 measurements. If deflection exceeds.50" (12.7 mm), replace timing chain and sprockets.

Turn crankshaft until timing marks are aligned. Remove camshaft sprocket bolt and washer, 2-piece fuel pump eccentric and front oil slinger. Slide timing chain and sprockets forward and remove as an assembly.

  1. Assemble timing chain and sprockets so sprocket timing marks are aligned. (Scheme 90) Install chain and sprockets as an assembly.
  2. Lubricate timing chain with engine oil. To complete installation, reverse removal procedure.

Aligning Timing Marks Remove and install chain and sprockets as an assembly. Scheme 90

Scheme 90: Aligning Timing Marks Remove and install chain and sprockets as an assembly.
  1. Remove radiator, front cover, timing chain and sprockets. Remove intake manifold and carburetor as an assembly. Remove valve covers.
  2. Loosen all rocker arm bolts. Rotate rocker arms to one side. Remove push rods and valve lifters, keeping them in order for installation in original locations.
  3. If equipped, remove A/C condenser and carefully secure condenser to left fender well. Remove grille. Remove camshaft thrust plate attaching bolts and remove camshaft, taking care not to damage camshaft bearings or journals.
  1. Oil camshaft journals and apply polyethylene grease to cam lobes. Carefully slide camshaft into position. Install and tighten thrust plate.
  2. Lubricate lifters with engine oil and install. Lubricate rocker arms, fulcrum seats, valve stem tips and push rods with polyethylene grease before installing.
  3. To complete installation, reverse removal procedure. Use new gaskets where required. (Scheme 91)

Camshaft Assembly Tighten camshaft sprocket bolt to 40-45 ft. lbs. (54-61 N.m). Scheme 91

Scheme 91: Camshaft Assembly Tighten camshaft sprocket bolt to 40-45 ft. lbs. (54-61 N.m).

CAMSHAFT END PLAY

CAUTIONDO NOT pry against camshaft sprocket without first relieving valve train load on camshaft.
  1. Loosen rocker arm fulcrum bolts to relieve load on camshaft. Push camshaft toward rear of engine. Install dial indicator so that indicator point is on camshaft sprocket attaching bolt. Zero dial indicator.
  2. Pull camshaft forward and release. Check dial indicator reading to obtain end play. If end play is excessive, replace camshaft thrust plate.

CAM LOBE LIFT

  1. Remove valve cover. Remove fulcrum bolt, fulcrum seat and rocker arm. Ensure push rod end is in valve lifter socket.
  2. Use a dial indicator to check lobe lift in consecutive order. Position dial indicator point (or cup-shaped adapter) on end of push rod (in same plane as push rod movement).
  3. Turn crankshaft until lifter and push rod are at lowest position. Zero dial indicator. Turn crankshaft slowly until push rod is fully raised. Compare dial indicator reading with specifications.
  4. Maximum allowable lobe wear is .005" (.13 mm). If lobe lift is insufficient, replace camshaft and valve lifter(s) operating on worn lobe(s).

Remove engine from vehicle. Remove camshaft, flywheel and crankshaft. Push pistons to top of cylinders. Remove camshaft rear bearing bore plug. Using camshaft bearing remover/installer, remove camshaft bearings.

Using camshaft bearing installer/remover, install bearings into place. Oil holes in bearings and cylinder block must be aligned. Install front bearing.040-.060" (1.02-1.52 mm) rearward of front face of cylinder block. Coat new rear bore plug with sealer and install. (Scheme 92)

Installing Camshaft Bearings Install front camshaft bearing .040-.060" (1.02-1.52 mm) rearward from front face of block. Scheme 92

Scheme 92: Installing Camshaft Bearings Install front camshaft bearing .040-.060" (1.02-1.52 mm) rearward from front face of block.

OIL PAN

See OIL PAN REMOVAL article.

  1. Remove cylinder heads, oil pan and oil pump. Place piston at bottom of its stroke and cover with a cloth to collect metal cuttings. Use ridge reamer to remove ridge or deposits from upper end of cylinder bore. NOTE: Never cut more than 1/32" (.79 mm) into ring travel area when removing ridge.
  2. Ensure all connecting rods and caps are marked for cylinder identification. Remove rod cap. Push piston and rod out top of cylinder. Use care not to damage crankshaft journal or cylinder wall. Install rod cap on mating rod.

Scheme 93

Scheme 93: Installation
  1. Coat cylinder bore, piston and rings with engine oil. Position ring gaps. (Scheme 93) Install ring compressor. DO NOT allow ring gaps to change. (Scheme 93): Correctly Spaced Ring Gaps Space oil ring segments 1" (25 mm) from oil ring spacer.
  2. Position crankshaft journal at bottom of stroke. Place piston into bore, with notch in piston head toward front of engine.
  3. Carefully push piston into cylinder bore until slightly below top of cylinder, then push it downward until rod bearing seats on crankshaft journal. Install and tighten connecting rod cap. Check side clearance between connecting rods on each crankshaft journal. Install cylinder heads, oil pump and oil pan.

FITTING PISTONS

Note. Take measurements with piston and crankcase at about 70°F (21°C).

  1. Measure piston at centerline of piston pin, 90° to piston pin axis. Measure cylinder bore 90° to crankshaft centerline, at top, middle and bottom of bore. Use measurements to determine piston-to-bore clearance.
  2. Measure cylinder bore 90° to crankshaft centerline at top of bore (below ring travel) and at bottom of bore (above ring travel). Taper is the difference between the 2 measurements. Taper must not exceed .010" (.25 mm).
  3. Measure cylinder bore at center of piston travel, 90° to crankshaft centerline. Measure bore at center of piston travel, in line with crankshaft centerline. Out-of-round (difference between the 2 measurements) must not exceed .005" (.13 mm).
  4. If taper or out-of-round are not within limits, or cylinder walls are deeply scored, bore and hone cylinders for installation of new pistons. Check PISTON SIZE CODES table.
CodePiston Size: In. (mm)
Red4.3585-4.3591 (110.706-110.721)
Blue4.3597-4.3603 (110.736-110.752)
.003" Oversize4.3609-4.3615 (110.767-110.782)

PISTON SIZE CODES

FITTING RINGS

  1. Position ring squarely in cylinder bore at a point where normal ring wear is not present. Use care not to damage ring or cylinder bore. Check ring end gap with a feeler gauge.
  2. Check side clearance of compression rings, by inserting feeler gauge between ring and its lower land. Feeler gauge should slide freely around entire circumference of piston without binding. If lower lands have high steps, replace piston.

Using an arbor press and piston pin remover/installer, press piston pin from piston and connecting rod. (Scheme 94)

Removing and Installing Piston Pin Install pin until end of pin is .063-.125" (1.59-3.18 mm) below chamfer of pin bore. Scheme 94

Scheme 94: Removing and Installing Piston Pin Install pin until end of pin is .063-.125" (1.59-3.18 mm) below chamfer of pin bore.

Scheme 95

Scheme 95: Installation
  1. Apply light coat of engine oil to all parts to be assembled. Assemble piston to connecting rod with numbered side of rod toward outside of engine and notch in piston head positioned forward. (Scheme 95) (Scheme 95): Proper Piston to Connecting Rod Position Position numbered side of rod toward outside of engine.
  2. Start piston pin in piston and connecting rod. Using arbor press and pin remover/installer, press pin into piston and connecting rod until end of pin is.063-.125" (1.6-3.2 mm) below chamfer of piston pin bore.

CONNECTING ROD BEARINGS

  1. Ensure rod caps are marked for cylinder identification. Place crankshaft journal of cylinder to be checked at bottom of stroke and remove rod cap. Using Plastigage method to measure rod bearing clearance.
  2. Standard bearings may be used with a .001" (.025 mm) or .002" (.051 mm) undersize bearing to obtain proper bearing clearance. With rod cap and bearing installed, check connecting rod side clearance between rod and crankshaft thrust face.

MAIN BEARINGS

  1. Fit main bearings one at a time, leaving other bearings securely fastened. Ensure main bearing caps are marked for identification. Remove main bearing cap. Position jack under counterweight, next to bearing being checked.
  2. Use Plastigage method to measure main bearing clearance. Standard size bearings may be used in combination with a .001" (.025 mm) or .002" (.051 mm) undersize bearings.
  3. If .002" (.051 mm) undersize main bearings are used on more than one journal, bearings must be installed in cylinder block side of crankshaft journal.
  4. Replace main bearing sets one at a time, leaving other bearings securely fastened. Remove bearing cap. Insert Upper Bearing Remover/Installer (6331E) into crankshaft journal oil hole. Turn crankshaft clockwise, rotating upper bearing out of block.
  5. Lightly oil bearing and journal surfaces. Partially install plain end of upper bearing in place. Insert bearing remover/installer into journal oil hole. Turn crankshaft slowly counterclockwise until bearing is seated, then remove bearing remover/installer. Install and tighten main bearing cap.

THRUST BEARING ALIGNMENT

  1. Install thrust bearing cap after all other main bearing caps have been tightened. Install thrust bearing cap bolts finger tight.
  2. Pry crankshaft forward against thrust surface of upper half of bearing. Hold crankshaft forward and pry thrust bearing cap to rear. Tighten thrust bearing cap bolts while retaining forward pressure on crankshaft. (Scheme 96)

Aligning Thrust Bearing Align thrust bearing after all other bearings have been tightened. Scheme 96

Scheme 96: Aligning Thrust Bearing Align thrust bearing after all other bearings have been tightened.
  1. Remove oil pan and oil pump (if required). Loosen all main bearing cap bolts to slightly lower crankshaft. DO NOT lower more than 1/32" (.79 mm). Remove rear main bearing cap and remove lower oil seal half. Use seal remover to remove upper seal.
  2. If seal remover is not available, install a small metal screw in one end of the seal. Pull on screw to remove seal. Use care not to damage crankshaft seal surface. If equipped, remove oil seal retaining pin from bearing cap. Pin is not used with split-lip type seal.

Scheme 97

Scheme 97: Installation
  1. Carefully clean oil seal grooves in bearing cap and block. Dip split-lip seal halves in engine oil. Carefully install upper seal into groove in cylinder block, with undercut side of seal toward front of engine. NOTE: Avoid damage to outside diameter of seal when installing in groove. DO NOT allow oil to get onto area where sealer will be applied.
  2. Rotate seal on crankshaft journal until about 3/8" of seal protrudes below parting surface. (Scheme 97) (Scheme 97): Installing Rear Main Bearing Oil Seal Use care not to damage crankshaft or new oil seal.
  3. Tighten all main bearing cap bolts except rear main. Install lower seal in rear main bearing cap with undercut side of seal toward front of engine.
  4. Allow seal to protrude about 3/8" above parting surface to mate with upper seal when cap is installed. Apply 1/16" bead of silicone sealer to both sides of cylinder block-to-cap mating surface and to both sides of bearing cap. (Scheme 98)
  5. Install and tighten rear main bearing cap before sealer sets up (about 15 minutes). To complete installation, reverse removal procedure.

Silicone Sealer Application Points Do not allow sealer to contact lip of seal. Scheme 98

Scheme 98: Silicone Sealer Application Points Do not allow sealer to contact lip of seal.

ENGINE OILING SYSTEM

Distributor-driven oil pump provides full-pressure lubrication to all camshaft and crankshaft bearings. Engine feeds oil through hydraulic valve lifters and hollow push rods to rocker arms and upper valve train area. Timing chain and sprockets are lubricated by drainage from No. 1 camshaft bearing. (Scheme 99)

Engine Oiling System. Scheme 99

Scheme 99: Engine Oiling System

Crankcase Capacity

Crankcase capacity is 5 quarts (4.75L). Add 1 quart (.95L) when replacing oil filter.

Oil Filter

Change filter at first oil change and at every other oil change thereafter.

Normal Oil Pressure

Normal oil pressure at operating temperature should be 40-65 psi (2.8-4.6 kg/cm 2 ) at 2000 RPM.

Oil Pressure Regulator Valve

Oil pressure regulator valve is located in pump body. Valve is nonadjustable.

OIL PUMP

Note. If any part of oil pump needs replacing, replace entire pump.

Raise engine at least 4" from engine mounts. Loosen oil pan attaching bolts and lower pan. Remove oil pump and oil inlet tube and lay assembly in pan. Remove pan with pump assembly.

Disassembly

Remove oil inlet tube from pump. Remove pump cover. Remove inner rotor, shaft and outer rotor from oil pump. Drill small hole in oil pressure relief valve cap. Insert self-threading sheet metal screw into cap and pull cap from chamber. Remove spring and plunger.

  1. Wash all parts thoroughly and dry with compressed air. Check pump housing, outer rotor, inner rotor, shaft and pump cover for damage, scoring or excessive wear. Remove rotor assembly from pump housing. Using feeler gauge, measure inner-to-outer rotor tip clearance.
  2. Install rotor assembly in pump housing. Lay a straightedge over rotor assembly and housing. Insert feeler gauge between straightedge and housing to measure rotor end play. Using a feeler gauge, measure clearance between outer rotor and pump housing.
  3. Measure shaft outside diameter and housing bearing inside diameter. Difference between readings is shaft-to-housing bearing clearance.
  4. Relief valve spring should test to 20.6-22.6 lbs. (9-10 kg) at 2.49" (63.5 mm). Inspect relief valve spring for worn or collapsed condition. Check relief valve plunger for scores and free operation in bore. Check clearance between relief valve plunger and bore.
ApplicationIn. (mm)
Rotor Tip Clearance.012 (.30)
Rotor End Play.004 (.10) Max.
Outer Rotor-to-Housing Clearance.001-.013 (.03-.33)
Shaft-to-Housing Clearance.0015-.0030 (.038-.076)
Relief Valve-to-Bore Clearance.0015-.0030 (.038-.076)

OIL PUMP SPECIFICATIONS

Reassembly

Clean and oil all parts thoroughly. Install relief valve plunger, spring and new cap. Stake cap into position. To complete reassembly, reverse disassembly procedure.

Prime oil pump. To install oil pump, reverse removal procedure. Use new gaskets.

  1. Drain cooling system. Remove fan shroud and fan. Loosen power steering pump attaching bolts. If A/C equipped, remove compressor top bracket. Remove A/C idler pulley and bracket assembly.
  2. Remove all drive belts. Remove air pump, alternator and bracket, and power steering pump. Disconnect all hoses from water pump, and loosen by-pass hose clamp at pump. Remove remaining attaching bolts and remove water pump. Remove separator plate from water pump and discard gaskets.

To install, reverse removal procedure. Use new gaskets coated on both sides with water-resistant sealer.

Note. For further information on cooling system capacities and other cooling system components, see ENGINE COOLING SYSTEMS article.

TORQUE SPECIFICATIONS

ApplicationFt. Lbs. (N.m)
Camshaft Sprocket Bolt40-45 (54-61)
Camshaft Thrust Plate Bolt9-12 (12-16)
Connecting Rod Nut45-50 (61-68)
Cylinder Head Bolt
Step 180 (108)
Step 2110 (149)
Step 3130-140 (176-190)
Exhaust Manifold Bolt28-33 (38-45)
Flywheel-to-Crankshaft Bolt75-85 (102-115)
Intake Manifold Bolt22-32 (30-43)
Main Bearing Cap Bolt95-105 (129-142)
Oil Filter
Adapter-to-Cylinder Block Bolt40-50 (54-68)
Insert-to-Cylinder Block/Adapter Bolt45-55 (61-75)
Oil Pump Attaching Bolt22-32 (30-43)
Rocker Arm Fulcrum Bolt18-25 (24-34)
Vibration Damper-to-Crankshaft Bolt70-90 (95-122)

TORQUE SPECIFICATIONS

GENERAL ENGINE SPECIFICATIONS

ApplicationSpecification
Displacement
Cu. In.460
Liters7.5
Fuel System4-Bbl.
HP @ RPM(1) 226 @ 4400
Torque Ft. Lbs. @ RPM(2) 365 @ 2800
Compr. Ratio8.0:1
Bore4.36" (110.7mm)
Stroke3.85" (97.8mm)
(1) 221 @ 4200 for California models. (2) 361 @ 2600 for California models.
(1)221 @ 4200 for California models.
(2)361 @ 2600 for California models.

GENERAL ENGINE SPECIFICATIONS

VALVE SPECIFICATIONS

ApplicationIn. (mm)
Intake
Head Diameter2.075-2.090 (52.70-53.09)
Face Angle44°
Seat Angle45°
Seat Width.060-.080 (1.52-2.03)
Stem Diameter.3416-.3423 (8.677-8.694)
Stem Clearance.0010-.0027 (.025-.069)
Valve LiftN/A
Exhaust
Head Diameter1.646-1.661 (41.81-42.19)
Face Angle44°
Seat Angle45°
Seat Width.060-.080 (1.52-2.03)
Stem Diameter.3416-.3423 (8.677-8.694)
Stem Clearance.0010-.0027 (.025-.069)
Valve LiftN/A

VALVE SPECIFICATIONS

PISTON/PIN/RING SPECIFICATIONS

ApplicationIn. (mm)
Piston Clearance.0022-.0030 (.056-.076)
Pins
Piston Fit.0002-.0005 (.005-.013)
Rod FitInterference Fit
Rings
Rings No. 1 & 2
End Gap.010-.020 (.25-.51)
Side Clearance.0025-.0045 (.064-.114)
Ring No. 3
End Gap.010-.035 (.25-.89)
Side ClearanceSnug

PISTONS, PINS & RINGS SPECIFICATIONS

BEARING SPECIFICATIONS

ApplicationIn. (mm)
Main Bearings
Journal Diameter2.9994-3.0002 (76.185-76.205)
Clearance.0008-.0015 (.020-.038)
Thrust BearingNo. 3
Crankshaft End Play.004-.008 (.10-.20)
Connecting Rod Bearings
Journal Diameter2.4992-2.5000 (63.480-63.500)
Clearance.0008-.0015 (.020-.038)
Side Play.010-.020 (.25-.51)

CRANKSHAFT MAIN & CONNECTING ROD BEARINGS SPECS

VALVE SPRING SPECIFICATIONS

ApplicationSpecification
Free Length2.06" (52.3mm)
Pressure (2)
Valve Closed76-84 @ 1.81 (34-38 @ 46.0)
Valve Open218-240 @ 1.33 (99-109 @ 33.8)
(1) Valve spring installed height is 1.797-1.828" (45.64-46-43 mm). (2) Lbs. @ In. (Kg @ mm).
(1)Valve spring installed height is 1.797-1.828" (45.64-46-43 mm).
(2)Lbs. @ In. (Kg @ mm).

VALVE SPRINGS SPECIFICATIONS (1)

CAMSHAFT SPECIFICATIONS

ApplicationIn. (mm)
Journal Diameter2.1238-2.1248 (53.945-53.970)
Clearance.001-.003 (.03-.08)
End play.001-.006 (.05-.15)
Lobe Lift
Intake.252 (6.40)
Exhaust.278 (7.06)

CAMSHAFT SPECIFICATIONS